possibilities include…
https://www.niddk.nih.gov/health-information/digestive-diseases/viral-gastroenteritis/symptoms-causes
https://www.farmhealthonline.com/US/disease-management/cattle-diseases/rotavirus-and-coronavirus/
A norovirus is a group of viruses that are single-stranded positive-sense RNA, non-enveloped viruses belonging to the family Caliciviridae.
A coronavirus is a group of single-stranded positive-sense RNA enveloped viruses belonging to the family Coronaviridae in the order Nidovirales.
Norovirus is significantly smaller than coronavirus. To give you some idea of scale, the Norovirus is about 23–40 nm in size whereas the little spikes on the surface of a coronavirus are 20 nm high.
Muh Russia, muh impeachment, muh Corona, still a bit of time between now and October for one more surprise. This one is running out of steam….
"ammunition is finite'
aerosolizable, particulate size, etc.